公开(公告)号：WO1991007809A1

公开(公告)日：1991-05-30

申请号：PCT/US1990006856

申请日：1990-11-21

Applicant: TANDEM COMPUTERS INCORPORATED

Inventor： TANDEM COMPUTERS INCORPORATED ,  TIGHE, Donald, J. ,  NEILSON, Joseph, S.

IPC: H02M07/04

CPC classification number: H02M1/4216 ,  H02J3/26 ,  H02M7/23 ,  H02M2001/4283 ,  Y02B70/126 ,  Y02E40/50 ,  Y10T307/516 ,  Y10T307/625

Abstract: A balanced three phase AC power supply (12) for a computer system having unbalanced, variable DC loads (34). AC to DC converters (18a-c) utilize high power factor correction circuitry to impose a sinusoidal current loading waveshape (23) substantially in phase with the AC voltage (24). Each AC to DC converter outputs equal DC voltages maintaining a balanced loading on the AC power source. The design and organization of the power supply components make the supply fault tolerant when one phase (øA, øB, øC) of AC power or one AC to DC converter is lost due to malfunction or servicing.

公开(公告)号：WO1991007799A1

公开(公告)日：1991-05-30

申请号：PCT/US1990006862

申请日：1990-11-21

Applicant: TANDEM COMPUTERS INCORPORATED

Inventor： TANDEM COMPUTERS INCORPORATED ,  TIGHE, Donald, J. ,  NEILSON, Joseph, S.

IPC: H02H09/00

CPC classification number: H02H9/004 ,  H02H9/02

Abstract: A system for preventing voltage drops when a load circuit (12) is connected and preventing arcing when a load is disconnected from an energized bus (14) includes a current limit device (26) and low impedance shunt (28) that bypasses the current limit device when activated. The system activates the low impedance shunt only after a load capacitance is charged when the load is connected and deactivates the low impedance shunt prior to disconnecting the load.

公开(公告)号：EP0502096B1

公开(公告)日：1995-09-27

申请号：EP91900477.0

申请日：1990-11-21

Applicant: TANDEM COMPUTERS INCORPORATED

Inventor： TIGHE, Donald, J. ,  NEILSON, Joseph, S.

IPC: H02M7/04 ,  H02M1/00 ,  H02M7/23 ,  H02J3/26

CPC classification number: H02M1/4216 ,  H02J3/26 ,  H02M7/23 ,  H02M2001/4283 ,  Y02B70/126 ,  Y02E40/50 ,  Y10T307/516 ,  Y10T307/625

Abstract: A balanced three phase AC power supply (12) for a computer system having unbalanced, variable DC loads (34). AC to DC converters (18a-c) utilize high power factor correction circuitry to impose a sinusoidal current loading waveshape (23) substantially in phase with the AC voltage (24). Each AC to DC converter outputs equal DC voltages maintaining a balanced loading on the AC power source. The design and organization of the power supply components make the supply fault tolerant when one phase (øA, øB, øC) of AC power or one AC to DC converter is lost due to malfunction or servicing.

公开(公告)号：EP0502096A1

公开(公告)日：1992-09-09

申请号：EP91900477.0

申请日：1990-11-21

Applicant: TANDEM COMPUTERS INCORPORATED

Inventor： TIGHE, Donald, J. ,  NEILSON, Joseph, S.

IPC: G06F1 ,  H02J3 ,  H02M1 ,  H02M7

CPC classification number: H02M1/4216 ,  H02J3/26 ,  H02M7/23 ,  H02M2001/4283 ,  Y02B70/126 ,  Y02E40/50 ,  Y10T307/516 ,  Y10T307/625

Abstract: Alimentation (12) en puissance de courant alternatif triphasé équilibrée, pour système informatique à charges (34) de courant continu variable non équilibrée. Les convertisseurs (18a à c) de courant alternatif en courant continu, utilisent un circuit de correction de facteur de puissance élevé, afin d'imposer une forme d'onde (23) de charge de courant sinusoïdale, en phase avec la tension (24) de courant alternatif. Chaque convertisseur de courant alternatif en courant continu produit des tensions de courant continu égales maintenant une charge équilibrée sur les sources de puissance de courant alternatif. La conception et l'organisation des composants d'alimentation en puissance rendent l'alimentation insensible aux défaillances lorsqu'une phase (oA, oB, oC) de puissance de courant alternatif ou un convertisseur de courant alternatif en courant continu est perdu du fait d'un mauvais fonctionnement ou d'une intervention.